Exam Maths Puzzle Number System

Find the absolute value of each complex number

1. 6i

2. 9

3. -4 - 3i

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Exam Other Question

How many 5-number license plates can be made using the digits 1, 2, 3, 4, 5, 6, 7 if repetitions are allowed? not allowed? Find the additive inverse of each number

1. -4+6i

2. 9-5i

3. -2-6i

4. 1-8i